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dc.contributor.author Ankutowicz, Eric J
dc.contributor.author Laird, Robert A
dc.coverage.spatial Alberta
dc.coverage.spatial Canada
dc.date.accessioned 2017-12-07T18:34:16Z
dc.date.available 2017-12-07T18:34:16Z
dc.date.issued 2017-12-05
dc.identifier doi:10.5061/dryad.29710
dc.identifier.citation Ankutowicz EJ, Laird RA (2017) Offspring of older parents are smaller-but no less bilaterally symmetrical-than offspring of younger parents in the aquatic plant Lemna turionifera. Ecology and Evolution, online in advance of print.
dc.identifier.uri http://hdl.handle.net/10255/dryad.162849
dc.description Offspring quality decreases with parental age in many taxa, with offspring of older parents exhibiting reduced lifespan, reproductive capacity, and fitness, compared to offspring of younger parents. These ‘parental age effects’, whose consequences arise in the next generation, can be considered as manifestations of parental senescence, in addition to the more familiar age-related declines in parent-generation survival and reproduction. Parental age effects are important because they may have feedback effects on the evolution of demographic trajectories and longevity. In addition to altering the timing of offspring life-history milestones, parental age effects can also have a negative impact on offspring size, with offspring of older parents being smaller than offspring of younger parents. Here, we consider the effects of advancing parental age on a different aspect of offspring morphology, body symmetry. In this study, we followed all 403 offspring of 30 parents of a bilaterally symmetrical, clonally reproducing aquatic plant species, Lemna turionifera, to test the hypothesis that successive offspring become less symmetrical as their parent ages, using the ‘Continuous Symmetry Measure’ as an index. Although successive offspring of aging parents older than one week became smaller and smaller, we found scant evidence for any reduction in bilateral symmetry.
dc.relation.haspart doi:10.5061/dryad.29710/1
dc.relation.haspart doi:10.5061/dryad.29710/2
dc.relation.haspart doi:10.5061/dryad.29710/3
dc.relation.haspart doi:10.5061/dryad.29710/4
dc.relation.haspart doi:10.5061/dryad.29710/5
dc.relation.haspart doi:10.5061/dryad.29710/6
dc.relation.haspart doi:10.5061/dryad.29710/7
dc.relation.haspart doi:10.5061/dryad.29710/8
dc.relation.isreferencedby doi:10.1002/ece3.3697
dc.subject Aging
dc.subject asymmetry
dc.subject mirror image
dc.subject shape analysis
dc.title Data from: Offspring of older parents are smaller—but no less bilaterally symmetrical—than offspring of younger parents in the aquatic plant Lemna turionifera
dc.type Article
dwc.ScientificName Lemna turionifera
dwc.ScientificName Araceae
dwc.ScientificName Lemnoideae
dc.contributor.correspondingAuthor Laird, Robert A
prism.publicationName Ecology and Evolution

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Title Ankutowicz_and_Laird_data
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Description Data from Ankutowicz and Laird, "Offspring of older parents are smaller—but no less bilaterally symmetrical—than offspring of younger parents in the aquatic plant Lemna turionifera"; see associated README file for column-header details.
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Title Ankutowicz_and_Laird_R_scripts
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Description R scripts accompanying Ankutowicz and Laird, "Offspring of older parents are smaller—but no less bilaterally symmetrical—than offspring of younger parents in the aquatic plant Lemna turionifera"
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Title otsu
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Description Matlab function for image thresholding.
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Title seg
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Description Matlab function for image segmentation.
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Title filt
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Description Matlab function for image filtering.
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Title floodfill
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Description Matlab function for flood-filling an image.
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Title bound
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Description Matlab function for boundary detection of an image.
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Title csm_mirror
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Description Matlab function for finding the continuous symmetry measure (CSM) associated with bilateral (/mirror) symmetry in an image.
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